Learn Farsi: برای ساختن این آلیاژ، مس و قلع را مخلوط می‌کنند. - To make this alloy, they mix copper and tin.

You can insert the proportion directly before the verb. For example, to say they mix them in a nine-to-one ratio, you would use noh dar yek (nine in one) and say: mes va qala' ra noh dar yek maxlut mikonand.

The verb مخلوط می‌کنند means 'they mix', but no specific 'they' is mentioned. Is this replacing the passive voice?

Exactly. While Farsi has a grammatical passive voice, native speakers often avoid it because it can sound clunky. Using the third-person plural without a subject pronoun is the most natural way to express a general, impersonal action, much like saying 'they mix' or 'people mix' in English.

Could I use the subjunctive instead of the infinitive ساختن (sâxtan) after برای (barâye)?

Yes, you could say barâye inke besâzand (in order that they make), but using barâye plus the infinitive is much more concise. It works perfectly here because it is a general statement where the implied subject applies to the entire sentence.

Does the direct object marker را (râ) apply to both metals?

Yes. The phrase mes va qala' (copper and tin) acts as a single compound noun phrase. The râ is placed at the very end of this grouping to mark both metals together as the definite direct object of the verb.

How is the word for tin, , pronounced, and why does it have that unusual ending?